Scottish Drivers Could Face Tougher Engine Idling Fines as Watchdog Demands Action

Leaving the engine running while you wait outside the school gates or sit in a layby could become a more expensive habit in Scotland. The country’s environmental watchdog has formally told the Scottish Government that the current penalties for engine idling are too weak to change driver behaviour, and has demanded a plan to toughen them. For the millions of motorists who routinely leave an engine ticking over, it is a clear signal that the cost of idling is under review.

The intervention comes from Environmental Standards Scotland, the body set up to make sure environmental laws are working as intended. It has laid an Improvement Report before the Scottish Parliament after concluding that the existing rules on idling, and the £20 fine that backs them up, are not acting as a strong enough deterrent. Here is what is being proposed, what the law already allows, and how to avoid a fine while the rules are reviewed.

What the Watchdog Is Demanding

Environmental Standards Scotland, known as ESS, began investigating the effectiveness of the idling rules after concerns were raised by an environmental charity. It questioned how far local authorities were actually enforcing the regulations, and whether the fixed penalty on the books was high enough to put drivers off. Its conclusion was that the legal framework intended to tackle idling, an avoidable source of air pollution, may not be working.

The Scottish Government agreed with the watchdog and said it would take action to strengthen the guidance on idling. But ESS says a resolution could not be reached to ensure that fixed penalty notices act as an effective measure, so it has now formally required Scottish ministers to publish an Improvement Plan setting out exactly how they will make the law work. Mark Roberts, chief executive of ESS, said: “Our work has concluded that the current legal framework intended to tackle engine idling may not be acting as a strong enough deterrent. By laying this Improvement Report in the Scottish Parliament, we are requiring Scottish Ministers to set out clearly how they will ensure the law here works as intended.”

The Rules as They Stand

Engine idling is already an offence in Scotland under the Road Traffic Vehicle Emissions Fixed Penalty Scotland Regulations 2003. Local authorities have the power to require a driver to switch off the engine when a vehicle is stationary, and to issue a fixed penalty notice of £20 to anyone who refuses. That figure has not changed in more than two decades, which is at the heart of the watchdog’s concern that it no longer carries any real weight.

The health case for action is significant. The UK Health Security Agency estimates that outdoor air pollution causes between 1,800 and 2,700 deaths each year in Scotland. Idling makes a needless contribution: leaving an engine running for even a short time, as little as 30 seconds, can produce more pollution than switching the engine off and restarting it. The Scottish Government’s own guidance highlights that idling is directly linked to heart and lung disease, and warns that children are at greater risk because they breathe more quickly than adults and take in more polluted air relative to their size, leading to more hospital admissions for youngsters with lung conditions.

Enforcement in practice has always been the weak point, and it is the reason the watchdog stepped in. A fine cannot simply be posted out like a parking ticket. An authorised officer has to approach the driver, ask them to switch off the engine, and only issue a penalty if the driver refuses. That makes idling enforcement labour intensive, and many councils have never set up a scheme at all. Where authorities have invested, the focus tends to be on pollution hotspots such as the streets around schools, hospitals, taxi ranks and busy junctions, often run as short awareness campaigns rather than constant patrols.

There is a simple financial argument for switching off that has nothing to do with fines. Idling burns fuel while delivering nothing, and an idling engine can use a noticeable amount of fuel over the course of a week of school runs and waiting in laybys. For drivers of older diesels in particular, repeated short periods of idling can also clog the diesel particulate filter, leading to warning lights and expensive garage visits. Switching off when stationary protects the wallet as well as the air.

The issue is sharpest for professional drivers. Taxi and private hire drivers, delivery couriers and parents on the daily school run spend more time stationary with the engine on than most, and they are the groups most likely to be targeted if Scotland brings in tougher rules. Fleet operators increasingly train drivers to switch off when parked, both to cut fuel bills and to avoid the reputational risk of being seen idling outside a school. Anyone who drives for a living should treat the review as a prompt to build switching off into their routine now.

How England Compares

The picture is similar south of the border, which is why any change in Scotland is worth watching for every UK driver. In England, Rule 123 of the Highway Code states that drivers must not leave a vehicle’s engine running unnecessarily while it is stationary on a public road, and must not leave a parked vehicle unattended with the engine running. Enforcement sits with councils under the equivalent 2002 regulations, with a fixed penalty that typically starts at £20 and can rise to £40 if it is not paid within 28 days.

Some English authorities have already gone further. Hackney in London raised its idling fine to £80, up from £20, in a bid to give the penalty more bite, and several other boroughs now run dedicated idling enforcement near schools and busy junctions. In almost all cases, though, a fine is only issued if a driver refuses to switch off when asked to do so by an authorised officer, which means a simple decision to turn the key usually avoids any penalty. If Scotland strengthens its regime, pressure is likely to grow for English councils to follow with higher and more actively enforced fines.

How to Stay on the Right Side of the Law

The practical advice is simple and saves fuel as well as fines. If you expect to be stationary for more than a minute, and you are not in moving traffic, switch the engine off. The old belief that restarting a car uses more fuel than idling no longer holds for modern engines, and many cars now have stop start systems that do this automatically. The most common places drivers are caught are outside schools, at level crossings, in pick up zones and in queues at barriers, so these are the spots to be most careful.

There is one seasonal trap worth remembering for the winter months. Leaving the engine running to defrost the windscreen on a cold morning while you go back indoors is both an idling offence and a breach of the rule against leaving a vehicle unattended with the engine running, and it is a gift to car thieves. Scrape the ice or use a cold weather screen wash and de mist with the blowers once you are in the car and ready to drive. Around schools, look out for signs marking idle free zones, where enforcement is most active.

For now, nothing has changed for drivers overnight: the Scottish fine remains £20 and is only issued after a refusal to switch off. But with the watchdog demanding an Improvement Plan and the government agreeing that the rules need to be stronger, higher penalties and tougher enforcement look likely in the next phase. Switching the engine off when you are parked is the cheapest way to stay ahead of any change. We will report on the Improvement Plan when it is published on Motoring Chronicle.

Sources:

• GB News
• RAC
• The Highway Code